Where should the CVP catheter be connected to obtain pressure readings?

Where should the CVP catheter be connected to obtain pressure readings?

• A. Distal port
• B. Umbilical port
• C. Proximal port to pressure monitoring system
• D. Reservoir port

Answer: (C)

Central venous pressure reflects the pressure in the right atrium, so you want the pressure signal to come from the port that provides the most direct, least-distorted view of that pressure. In a multi-lumen CVP catheter, the port used for pressure monitoring is the proximal port because it is connected to the transducer in a way that samples the venous pressure with minimal influence from infusion lines. The distal lumen is typically reserved for infusions, medication administration, or sampling from the vessel near the catheter tip, and using it for pressure monitoring can introduce flow-related artifacts. To get an accurate reading, connect the pressure monitoring system to the proximal port and ensure the transducer is zeroed at the phlebostatic axis (level of the right atrium) with the patient supine. Umbilical and reservoir ports have roles other than routine CVP pressure measurement and are not used for this purpose.

Central venous pressure reflects the pressure in the right atrium, so you want the pressure signal to come from the port that provides the most direct, least-distorted view of that pressure. In a multi-lumen CVP catheter, the port used for pressure monitoring is the proximal port because it is connected to the transducer in a way that samples the venous pressure with minimal influence from infusion lines. The distal lumen is typically reserved for infusions, medication administration, or sampling from the vessel near the catheter tip, and using it for pressure monitoring can introduce flow-related artifacts. To get an accurate reading, connect the pressure monitoring system to the proximal port and ensure the transducer is zeroed at the phlebostatic axis (level of the right atrium) with the patient supine. Umbilical and reservoir ports have roles other than routine CVP pressure measurement and are not used for this purpose.